Pipe threading and cutting apparatus.



W. W. VOSPER.

PIPE THRBADING 'AND GUTTING APPARATUS.

APPLIGATION FILED JULY5, 1912.

1,084 -,1 1 8, Patented Jan. 13, 1914.

9 SHEETSSHEET 1.

W. W. VOSPER. PIPE THREADING AND CUTTING APPARATUS.

APPLICATION FILED JULY 5, 1912.

" Patented Jan. 13, 1914.

' 9 SHEETSSHEET 2. v

QIIIIIIIIIIIIIII/A 1 W! I ZAZPETV'TUR. .JMW 7 ac M *w- W. W. VOSPER. PIPE THREADING AND CUTTING APPARATUS. APPLIOAATIQN FILED JULY 5, i912. 1 Q84 1 1 8 Patented Jan. 13, 1914.

' 9 SHEETS-SHEET 3.

JAZ'ENTDR.

Q7 @mm'? @0144,

WITNESSES W. W. VOSPER.

PIPE THREADING AND CUTTING APPARATUS.

APPLICATION I'ILBD JULY 5, 1912.

Patented Jan. 13, 1914.

9 SHEETSSHEET 4.

.ZAZVENTUR.

W. W. VOSPER.

PIPE THREADING AND CUTTING APPARATUS.

APPLICATION FILED JULY-5,1912.

1 ,08411 8. Patented Jan. 13, 1914.

9 SHEETS-SHEET 5.

wzz'NEssEsz' I JM/EN UR.

Q (5 7ZWM wmvm W. W. VOSPER.

PIPE THRBADING AND CUTTING APPARATUS.

APPLICATION FILED JULY 5, 1 912.

Patented Jan. 13, 1914.

JAZTENTUR.

W. W. VOSPER.

PIPE IHBEADING AND CUTTING APPARATUS.

APPLICATION FILED JULY 5, 1912.

Patented Jan. 13, 1914-.

9 SHEETSSHEET 7.

W. W. VOSPER,

PIPE THREADING AND GUTTINGAPPARATUS. APPLICATION FILED JULY 5, 1912.

1 084 1 18 Patented Jan. 13, 1914.

j 9 SHEETSSHBET 8.

WITNESSES" \ZNBENTUR.

f f/X @001 f @0014 1 #021 w, w. VOSPBR.

PIPE THREADING AND CUTTING APPARATUS.

APPLIGATION FILED JULY 5,1912.

9 SHEETS-SHEET 9.

WJTNESSEE' [NI/ENTER.

6 7204M @MYW #421 Patented Jan. 13, 1914.

at; a"'e'itizeii of t-he' United states and a resi- UILLIAM W. ,VosPER, or ToiiEno, 01110; As

r MACHINE COMPANY,'orronnno,

.rIPnTHREam e AND ilent of Toledo. in the county Lucas and "-St:'i't el'ot"()hio, hare invented a certain new with the control parts in inoperative posi- 60 and fns eful Pipe 'lhreading and Cutting tion. Fig". 14 is a cross-section on the line v niaratiis; and Ido hereby declare the fo1- z, iii-'Fig.-12 and Figi 15am detail'o'f a' as wing "tobe a (full, 'c'learfand "exact leportion of the locking means-for the heir. "e g-apnea of the invention, such-as will entrol parts. 105abl'*tithrs skilled in the :art to wliieh it Referring to the drawings lfidesignates 65 ap 'tains to make antlfiise the' saine, ref the hollow base frame of a machine en'ibodye e"l )eing' had t0 t he aeeoinpanyingdrawing the invention, and a rectangulai fran e in and to'ftlie eharaeters of reference part which is inonntetl inpon the left end ed thereon. whielr'fornra'partofthis -port-ion of the frame. A l'iollowshaft or 15 fifeifi cationj barrel. 4. is mounted.longitudinallyotthe 70 My inventionrelates particularly to maehines z-iclaptetl tor the entiting 'and threadiiw otpipes, rods. or the lllflfl bllt is not rie tetlto sue-1i pin-pose. as it may he "iisetl inaiiy connection torwliieh itniay be ada ted r,"appropriate." i

' priniaitjt' object "91 111! invention s e prov-i'sim of a an: "owei'" iiiaehine 'ofthis l eliai er".- which is siniple and etlieient in it rung and (hirable' in its eonnthe-r "kil'qt asfa iatlt a'ntafies of the rii it-l in war be apparent troin; the tollow- 'i pti oini V i h i 'nentioii is Fully.(leseribeihin :the Following 'si '-(-iiie:itioii. till ll while. in its h outle'r'aspeetf. it is (unable (it tllllmtlllnttlt lira-numerous -r ma. ..'a fireterretl eiiibotlinient thereot' isillustratedinthe aeeo'ipairwiire i tlran'ii'ie's. in 'wliieh, "lr i tw' t' 'is a 't'ront Sltlt eleiation otj a 40 inaehine embmty ing the lllYGntlTllt with mega-1mkm awa lfig 'sl .2 and. a re; eross 'iii' the line x. in l ifijfi ltioltil giiin -tions".indieatml by the arrows (t .peetit'ely. Figs 4 and 5 are 'ei'ossonfthe' lines L aiiil' 11.24. respecl' iirFig. i. Fig (tim partial longil seetion on the line 'I. I in Fig. re l' -fl'ereirt details. witli the of thefeliaser ailjnsting; e threading; i 5 is.;-a

. a i. 9. Fi it is a tron on the line in, in Fig.

a n enlarged cross-see- 0. Fig. 12is a =erit instance, a work-holcli CUTTING APPARATUS.

Patented Ja fi 3, "1.914.

1 han '7 horizontal cross-Section taken on the line y, 3 in Fig. 2. with parts broken away. Fig. 13 is an enlarged detail ofthe' control .lever locking means :and associated parts,

. tranie inbearings 5, JpI'OYitlQd inthe entls of the frame part9. and hasits outer end terminatingheyond the onterorleft-hand end of the .it'ranie and carryingein the pressnit'able eonstr-netion. tlhisj'ehnek is. 9t eed when worleisbeing tliread'e'd' or'eiit but enables the machine to he'iisetl as a to; tary rise if desired. The inne'i en d otthe shaft or barrel t tern'iinates Without them-' nor or right hand end offth'e fraine'iiart 2,

in the present instanee. atljaeent-to the l te giturlinal center of the base fraine and has such entl tonnetl with an oiitwardly pr0= jet-ting annular: flange T to which a suitable pipe threading nieans is attaehed for 1-mtion with the barrel. This pipe threading mean-s shown, in the present instance, as eoniprising a ring-like ehaser-earryi'ngheart ts. which is jt'orlneil on its outer side with a series of eqilirlistantly spared projeetions or besses E). which are radially recessed ttflfllly radially movable thread cutting chaser-bars 1 0 therein as best shown in Figs. (3. T and 8.

Chaser adjusting bloeltsfll are nfirn nterl in the recesses with the 't-haser-liars. 10 at the inner sides thereof anil are pi-oviglednn their eha-ser eoaetingr SltlGS with a series of note-hes 12 with which a teeth 13 on a plan- 'er l t. that. works iii-a transversely dis-1 ioseil-reeess' 15. inthe assoeiated chaser-ban,

normally engages"to, retaiir the ehasf ei' l')ar a1i(l-.a l nst1ng block in predetern ii'ietl pose. tions of relative long tnfh'nalf coilec l spring 16 is n'jountetl iI QtIiehaS 'of thenoteh 12 is effected by the turriing of a key 17. which is mounted in the outerend of each chaser longitudinally thereof and has its'inner end provided with a stud 18.'

tion of the key to facilitate a turning thereof. Each chaser-adjusting block 11 has a finger 2O projecting laterally therefrom through'a registering opening 21 in the 1nner sideof'the flange 7 and is influenced to move outward radially of the die carrying head by the action of the coiled expansion spring 22 thereon, which spring is mounted between the finger and the inner end of the opening 21, as shown in Fig. 8.

- A collar. 23 encircles the inner end por tion of the barrel 4 adjacent to the flange 7 for reciprocatory movements longitudinally thereof and carries a. plurality offingers 24.

' which project therefrom longitudinally of the barrel and are adapted to work into registering ones of the flange openings 21 without the respective fingers m. The fingers 20 and 24 have their coacting sides tapered to cause an inward depression of the fingers 2t) and attached blocks 11 a ainst the tension of the springs 21 when t e fingers '24 are moved toward the blocks 11 and into the openings 21, and vice versa. It is thus a parent that a slow'outward movement of t 10 fingers 24, from the osition shown in Fig. 8, will permit the ciaser-bars '10 to have slow outward radial movements for the purpose of imparting a taper to the thread be mg cut, the degree of taper being regulated by the taper of. the coacting surface of the fingers 20 and 24 or by the relative speed of outward movement of the fingers 24 to the speed of rotation of the thread cutting means,

A yoke 26 loosely encircles the collar 23 and is provided at o posite sides thereof with horizontally pro ecting trunnions 27, 27, which are mounted in'the upper ends of bearing arms 28. 28. as best shown in Fig. 4. These arms are fixed to the forward ends of bars 29, 29, which extend rearwnrdly therefrom, ortowar'd the left end of the machine, and are mounted for horizontal reciprocatory movements in guides 30, 30 attached to the outersides of the frame part 2. A

. rack-bar 31 is'mounted below each bar 29 for movementtherewith, or relative thereto,

in the guides 30 and has rack-teeth 32 provided at the under side of its left hand end beneath the barrel 4 and in mesh with a sehaving rock-arms at or adjacent to the ends thereof, which arms are connected by links 41 to the forward ends of the respective raek-bars 5-31. lVith this form of control for the collar 22 it is apparent that an upward swinging of the crank-arm 38 from its position, as shown in Fig. 1. will eflect a retraction or. outward movement of the fingers .24 from engagement with the chaser adjusting fingers 20 due to the rack-bars 31 being held stationary relative to the barrel 4 by the rack and pinion connection therehelween. It is also apparent that a reverse .moveineiit of the collar is eficcted by a rcarward throwing of the crank-arm '38 from upright position to its inclined position shown in Fig. 1.

The rock-arm and link connection 4-.0-41 between the rack-bars 31 and. shaft 39 is such thatwhen the crank-arm 38 is in the operative thread cutting position shown in Fig. 1, a longitudinal movement of the rackbars 31 toward the right hand end of the machine will be comn'n lnicated through the arm 28 and yoke 26 to the collar 23. In order to cause the collar 23 tohave a relatively slower forward feeding movement thanthe barrel 4 during the thread cutting operation to efiect a slow retraction of the fingers 24 and permit-consequent slow outward radial movcmeiits of the thread cutting chasers to impart the desired taper lo-the thread being cut, the pinions 35, are of smaller diameter than the pinion 36 on the shaft 34. thus causing the rack-bars 31 to have a relatively slower forward feedingmovement than the barrel.

The barrel 4, in the 'n'csent instance. is

driven from an electric motor 42 th ough suitable gearing, which preferably has a change speed mechanism in train therewith. This change speed mechanism is mount ed in a housing part 43 at the rear side of the base frame 1 and has its drive-shaft 44 in connection with the motor-shaft through a set of gears 45, and said shaft. carries two sleeves 46 and 47. which in turn carry the spaced pinions 48, 4B and 4-9, 4-9. respectively. A second shaft. 50 is mounted within the housing 43 in parallelism with the shaft 44. and carries gears 51 and 51 for mesh I'espew 'tively with the pinions and 48', and gears 52 and 52 for mesh resnectivelv with the P DS 4:9 and 49". The sleeves a6 d 47 are featheredto the shaft 44, and their shiftingmovemen'ts are controlled by a lever which is fulcrumed to the frame as at and has itsfo'ward end projected through the front side of'the base frame 1. The inner end of the lever 53 is adapted to be moved upward or downward from. neutral position into engagement with forked lingers 55 and 56, respectively, 'which fingers are mounted. for shifting movements on a shaft 57, mounted in the housing 43 below shown in Figs. 1, 13 and 14.

.' acts with the lever gears on the shaft 5t) the; 51 in the present instance. meshes w th gear 6Q on a shaft '61. which shaft is n'muno ed longitudinally of the base frame -1 in suitable bearings (52 therein. his shaft carries a loose gear 63in mesh with agear M, which is keyed to the barrel 4. 3r n'lovablc clutch member 65 is mounted "for" shifting movements on the shaft 61 and is adapted to be moved into or outof clutch engagc-z ment with the adjacent end of the gear 433 by a movement of a shift lever 66, which is fulcrumed to the frame, as at 67 and has its v by a movement to the left of a U P whlehlis mounted inignides ?(S a' free end projecting horizontally without the front-side of the base frame 1 through GS-therein (see Figs. 12 and 13).

The outer left hand end of the shaft (i1 1; provided Without the base frame '1 with a loose gear 69, v l g'ch hasa sleeve projecting therefrom through the d iaceht hearing (3:? and provided at its" inner end with a rlulwh surfape with whicha movable clutrh mrzn her 76, on theshaft-(l'h may be engaged. ft shiftdever "ii for the clutch neinlrr Til is 'fulcrumed ut'lhe rear of such me'uiheiz as at 72 and has its forward end .ed throug a slot 73in the front sido'ol i base framel. The lever 71 is iu-nn'uiila l in clutch released position by a and shifted to clutch engn iar 7 a the trout 1 hand end side of the base'framc. with 10 in Contact with-the outer end or t 10 lever asbest shown in Fig. 152. 'A- i-ontrol lover l f for t-he shift bar 75 is tulerumed in the from side of the'fra'me part as at T Fins. it 2 and 5, and hasa pin Til projecting inn. d from its lower end through a slot so in inc. heme andin' positiont have lateral mull-21:.-

a slot l l l l i l l is apparent with this arrangement of clutch control that a shifting of the upper end of. the lever 77 lo the right will move the bar 75 and shift-lever 73 from normal positions and effect an engagement of the clutch mcmher '70 with its companion to communicate rotation from the shaft (51 to thegear 69.

The gear 69 meshes with a gear 81, Which is keyed to a sleeve 82 that encircles the barrel laud projects from saidgear through the adjacent bearing 5, being radially flanged at its opposite end to act against hegear 81 to anchor such gear and sleeve movements relative to The connection between the sleeve and shaft 61 is such as to cause the sleeve to rotate at a slightly. different speed from the barrel 4. and this feature, in conjunotion with a fixed block 83 on the barrel 4 worlo in; in a spiral groove S-l which is formed in a part 84 that is bolted or otherwise suitably attached to the inner end of the sleeve 82, causes the barrel 4- to feed slowly fiirward or to the right, when both gears (3'4 and 81 are being driven. In the present instance, the gear 81 has one less tooth than the end of the hearing 5 in opposition to 1 against longitudinal the frame. Q)

the gear 64 to make the desired difleiwence in sleeve 82. V

In order to render it necessary to set the change speed mechanism for the proper speed of driving the barrel 4 to suit the diameter of the pipette be threaded, before throwing either clutch member or into engagement withit's companion, I pro-.

vlde a simple lock mechanism for such purpose. This mechanism (see Fi 13) comprises a horiaontally-disposed. arm 85 which is pivoted to the froutof the base frame 1,218.

at 86. and extends over the i-i-slot 59 and rests adjacent to its free end upon. the lever, 66. A plate 87 is suspended, fronr tle arm 85 for v r ical u'iovemenls tllei 'e with. being guided in such movements by screws 88 projwting through verlically-dispos'ml slots :89 in sahl, plate and attaching to the front of the tranie 1 s id plate having a guide-slot fill) therein which i of similar shape to and rcgl'isl'er th the guide slot 59 in the base frame, when the plate is in tlie'raised positi n shown in in: 13 the control lever 53 tor the sniff. gears of thechange speed mechanism can he umved into any one of the arm's of tl or oil r suitable form of guide slot vhich is provided by the slots and J ll in the frame 1 and plate 87. Vhen the lever 36 shifted to throw the clutch (in into engagement with its com panion. such lever a notch or underrut All in the arm 8-5, thus permitting said arm and the plate 87 carried thereby to lower into position to lock the lever -53 in shifted position due to an associated i'iotch or recess one of which is provided in the upper wall of each of the arms of the slot $10, moving down over the lever 53, as indicated in Fig. 1, thus locking the lever against n'iovei'ncnt from such position until the plate 81' has been raised for such purpse.

The arm 85 in addition to cooperating with the plate 87 to lock the lever o3 in shifted position also has the free end there- 'of turned upward and adapted to enter a registering notch 93 (see Fig. 15) in the shift-bar 7.) when such arm is in the ele- .engage the forward or right hand end of the shift bar 75 and prevent a retraction thereof from clutch en aging position while the fingers 24- are in chaser depressing position. The upper end of the lock-bar 94 is provided with a cross arm having a horizontal race in its inner side in which a stud 95 on a dog'96 works. The dog .10 is mounted for vertical reciprocatory movements in a vertiealrecess t)? in the outer side of the associated bar '29 and its nose or lower end projected into a recess 98, which is provided in the top edge of the associated rackhar 31 and registers therewith when the bars 29 and 31 are in the positions which, they assume when the crank-arm 38 is in its operative position. The rear end wall of the recess 98 and the nose ofthe dog 96 are provided with beveled surfaces which coact to effect a raising of the dog tomove the lock-bar 94 out of locking engagement with the shift-bar 75- when the bars 29 and 31 are relatively moved by a shifting of the crank arm 38 to inoperative position.

.\n adjusting screw 1). (Fig. 1.5) is threaded into the rear end of the bar 29 and has its head enacting. with the rear end of the bar 31 to' limit the relative shifting movements of such bars which 15 occasioned by a movement of the crank arm 38 to operative position. thus gaging the minimum dia uetei of a thread to he cut. as the less the relative movement of said bars the. less wiH bethe ehaser'depressmg movements of thercon. as hest shown in Figs. 1 and Rising in fixed relation from the top of the table 101, in the present instance, are two work holding heads 102, 102 each of which is provided with a plurz'ditvo'l' radiall'v movable hars 103 for cooperating to clamp a pipe or other work 104 in centered position relative to the threading head 'lhe clauu'iing bars- 103 of each clamping head ,have radial clamping moven'ients imparted in unison thereto by the rotation ol :1 s roll-disk 105, as is common in apparatus of this class. key-shaft 10 carries a pinion in mesh with teeth on the periphery of the disk 105.

it is to he understood that while 1 have shown a particular form of work clamping means, any suitable means may he provided for such purpose.

The table 101 has a rack-liar 10? pro- .vhled centrally on its under side longitudinally thereof with which a piuicn 1118, that is carried h a. transvcr-c shaft 109. meshes. The shaft 109 projects without a hearing in the front side of the frame base and has a multiple-arm ccutlol wheel 110 secured thereto. The inner side of th huh portion of the hand wheel is: provided with a .t'rictiou clutch mcmhcr 111 which tits into a eomplemeutal clutch mcmhcr 112 that is fixed to the 'l'ramc. multiple arm out 113 is threaded to the outer end of the shaft 109 and is adapted to act on the huh portion of the control-wheel 110 to force its inner end into clutch engagement with the part 11".! to lock the table 101 in adjusted position.

pipe putting mechanism 114- is luouutcd for sliding movements transverselyof the frame 1 between the threading head 3 and the inner work clamp 102. being guided in such movements by the way 115. which has dovetailed engagement with the base of said mechanism. as shown in Figs. '1. and it). This way has an extension beyond the rear side of the machine frame to enable the cutter to he moved from between the work threading and clamping parts to the inoperative position showu'in Fig. 3 whcn not in use. The cutter head 114v comprises an annular casing part 1113 which rises from tral opening 118 and its outer edge later ally flanged. as at 119. master gear 120 is mounted at one side of the casing 116 and has its toothed portion working within the flanged portion 111) of the casing. and has a laterally projecting huh 121 which is 1 'ruu'nalcd in the o )enin 119 of the casin r i i l .triug 122 is lined to the outer end of thc gear huh 121 and ooacts with the respective end of the t ming huhto hold the gear 120 thereto and aiso'z erv "to retain a r1ug 12-) for rotary movements oii theontei hlih end I l of the casing. "l he gear 120 hasa plurality"- of bars 124 mounted for radial movements tlleIElIlflluletiCh-(ta1'1' \.l1lg a tcuttingfdle 12 asnvell undei'sto -ul hithe art.i Ti l e-bars 124s are-provided on their innersides with teeth for ,meshing' with zuspii'al. scrollwon- .the side of agear'126, which gear is mount- 'ed 'within a part of-the master gear 12 for rotation relative thereto. 7

The=inaster gear 120 carries a stub-shaft 12? adjacent to the outer edge thereo on which ismoiinted a pinion 128 in mesh witha gear 126. This "shaft-also carries a star wheel"129, which. is intermittently rotated by striking pins "130 arranged at predeter 'minedpoints in its" path of revolution thus ;-causingrotation to be intermittently co1nmiinicated to the gear 126 to impartinward radial "adjustment. to the"cutting"dies 125 when the cutter in operation.- The'pins 130 project inward through registering slots 131 in the casing 116 from the outer ends of parentthat levers 132, jwhich ;levers are fulcrunied to the outer side ofl'the casing, as at .133, and are provided. at their inner ends with laterally projecting pins 134, which work in radial recesses 135 in the ring 21 j- Itfis thus ap a-turning of'the"ring 123 in one direction will movethe levers 132 to throw the-pins 150 into the path of movement ofthe star Wheel 1251 to cause automatic'inward b-radial adjustment to be imparted .to the 1. around the gear 136'a'nd is influenced by a weightil38 attached thereto by a strap 1 91sec Fig-3), to normally stand in the position shown in Fig. 3 to cover and guard thehpper portion oflsaid pinion. When the -iitter 11 1 is pulled forward into operative position th'e forward end of its'base 117 coaets with the" adjacent side edge of the guard 1'37 and throws suchguardinto the inoper- "ative'fpo'sition shown in Figs. 9 and 10 to permit a meshing of, the gears 120 and 136. 140 designates any suitable form of lockingmeans, which iscarried by the forward end of the'way 115 and is adapted to engage the v forwiard end of'the cutter base 117. when in op rative position. toretain' thesame in such positi an Vhile I have shown a particular. etionjof work-cutting mechanism i't to,betanderstood that the invention is not.

limited to the usjof. such means, as'any suitable-ruttingimeans may provided.

141 designates a rocker-ar m which is ful v r cili'nied, as at 142, to the rear side of tl'iej' frame 1. in position for its upper end to be swung? ineadva nce ofathefcnwvard end iof thei cutter head bars. 117, shown in? -l lig.w3,z

and is conncrtechby ilzQOIliI'Ol'rlOd 143 to the;

lever 66,. whereby a movement of. such lever to engage its clutch with the pinion-63 Willfi swing the 31111141- to cutterheadlocking position,: thus preventing a forward move-'1:

ment of such head when anism is being operated.

' The operation of th'e'machine is as -fol-'7 lows: when using the machine for the pure:

pose of cutting'a threadon a pipe;.r0d,='or

the threading n-iech a the like, the operatorprojectsthe w'or-k,'-=104,5"

to he threaded itlirougl-i the. holdersl 02 b v% which it is clamped in centered relati'oh t(' the threading parts, thefend to be threadedai being disposed in, suitable position for ether threading means to work thereover when the machine is operated, The operator then sets the lever handle for thedesiredi speed of driving ofthe barrel 41', asthejdiaamet-er of the workmay require after. which 5 the lever 66'is ni'oved to the left to place-"i. the clutch member into engagement withi, its companion to effect a drivinglof thedi'a rel at from the shaft (11, which latter- 111 turn driven from the drive-shafte throughf the-intermediate s )eed chan e. mechanismof 5% provided for such purpose. -l h'e movement.

of the lever 66 t0 clutchengagingpositionipermits the arm' SS and attached lock plat'e 87 to lower, due to. the lever moving inter register with the recess 91 in the lower-edge of said arm, thus effecting a lock-ingot the speed change lever 53 in" shifted position by. reason i of the registering recess 92 in the lock-plate moving downward thereov er. The lowering of the arm 85 also with draws the upturned free end thereof fromlocking engagement with the notch 9am. the shift bar 75 to render such barfree'to be shifted by amovement of the controt lever :77 to throwthe clutcl1. 70 into engage l ment with the clutch end of the pinion 139.

for the purpose of drivingthe'ge'ar Stand feedrollar 82'to which it is attached. The operator, however, prior to. throwing the lever 77 to effect an engagement: of the clutch 69-70, throws the threading! die controlling lever 38 to the left, or to the i'n clined position shown in Fig. l, in order to, shift the collar 23 and fingers carried; thereby to die depressing position. as best shown in Fig. .8; in moving the lever 38 to its inclined operative posit-ion. the rackbar stands at rest due to its being 1I1-" chored to the barrel 4 through the medium of the rack bar and pinion connection therebetween. so that the lever swings with its point of connection to the -bar 31 as its 'flll- I shaft with the bars 29, the length of such movement being regulated by an adjusting of the screws 99 which coact with the rear ends of the rackbars 31 to limit the forward movements of the bars 29 and attached parts relative thereto. A forward movement of the yoke 26 and collar 23, to which it is attached, forces the fingers 24 into depressing engagement with the fingers 20 of the respec tive chaser adjusting blocks 11. The operator now throws the lever 77 to engage the clutch 69-70 to drive the feed collar 84. The revolving of the barrel 4 and 'feedcollar 84 at slightly dilferent speeds, due to the difierence between their respective driving connections with the drive shaft 61, causes a slow forward feeding of the barrel 4 and chaser-carrying head 8 .relativeto the work by reason of the block 83,;which is fixed to the barrel, travelin in the tapered or spiral wa 84 in the col ar 84'. As the barrel 4 fee s forward the collar 23 moves forward therewith at a sh htly slower speed, due to the pinion 36 w iich meshes with the barrel rack 37 being slightly larger than the pinions 33, which are carried on the inion 37 and mesh with the .respectiverackars 31, which rack-bars are connected with the collar 23, as hereinbefore described. The relative forward feeding movement which is thus imparted to the barrel 4 and fingers 24 causes a slow recession of said fingers from depressing engagement with the,chaser fingers 20 to permit a gradual outward movement of the chasers for cutting a tapered thread on the work. The minimum diameter of the thread is regulated by an adjusting of the screw 99, as su h adjustment changes the length of the forward strokeof the fingers 24 and consequently the de cc of depression of the chasers. Whenfile shift'bar 7 5 has been thrown to its clutch engaging position the lock-bar 94 drops into locking engagement therewith to prevent its return to normal or clutch released position until the lever 38 has been thrown to vertical or inoperative position to move the fingers 24 to inoperative. position. Upon such movement of the lever 38 to its inoperative position a dog 96, which is carried by one of the bars 29 for movement therewith and has engagement with the upper end of the lock bar 94,, is raised out of the depression 98 in the assmiated rack-bar 31 and effects an automatic raising of the lock-bar 94 to inoperative position, thus permit-ting a throwlng out of the clutch Gilby the action of the spring 74. When it is desired to cut a. pipe the operator first places the speed change lever :33 in the proper position for driving the shaft (31 at a desired speed and then draws the cutter head 114 forward on the way 113 to place the master gear 120 of the cutter into mesh with the pinion 136 (in the drive shaft 61, the cutter head be ing stopped in pro )er register with the work holding parts by contact of the forward end of its base with a registerin stop on the forward end of the way 115. hen the cutter head is in operative'position it is locked a inst rearward movement b a suitable loci means 140, which is carrie at the forward end of the wa 115. The work which is held by the hol ers 102 can now be moved forward into proper position for cutting b a rotation in the proper direction of tie work feeding wheel 110, as is well understood in the art. The barrel 4 being hollow the work ma therethrough, if desired. T e cutting dies be projected 125 are thrown into commission by a move ment of the ring 123 in the proper direction to more the pins 130 into the path of movement of the star wheel 129, as is well understood in the art. When the-cutter head 114. is in its inoperative position as shown,

in Fig. 3, and the threading mechanism is in operation, the former is ocked against a forward movement by the rocker-arm 141, which has connection with and is thrown. into cutter head ockin position by a throwing of the lever fifi into clutch engaging position.

wish it understood that the. invention is notlimited to any specific construction or arrangement of the parts, or to the'use of any particular forms of threading, cutting and work holding mechanisms, exce t in so far as such limitations are specific in the claims.

Having thus described my invention, what 7 I claim as new and desire to secure by Letters Patent, is-

1. In combination, a rotatable and axially movable thread-cutting mechanism having 'movable' thread-cutting dies, die controllin means rotatable with said mechanism an axially movable relative thereto to vary the distance between the axis of said mechanism and the cutting points of its dies, said means being quickly retractable in an axial direction from die depressing position, and mechanism operable to impart rotary movements to said thread-cuttin .mechanism and means and difierential axia movements in the same direction thereto.

2., In combination, a rotatable and axially movable thread-cutting mechanism haying movable thread cutting dies, means rotatable with said. mechanism and shiftableaxially thereofand operable to control the movements of the dies of said mechanisnr to vary thedistance betweentheir cutting points and their turning axis, means for imparting rotary and axial movements to said mechanism, manually operated means for quickly shifting said'rotatable means in an axial direction relative to said mechanism, and means for communicating axial moves Lt sea inents to said die controlling, means relative to-the axial movements of said mechanism when the mechanism isbein operated.

3. In combination, a rotata le and axially movable thread-cutting mechanisrmhaving movable thread-cutting dies, die controlling means rotatable with said mechanism and axially movable relative-thereto to vary the distance between the axis'of said mechanism and the cutting points of its dies and movable in one direction relative to the shaft to move the chasers inwardly and in the opposite (llIQCtlOIl to permit an outward 'movernent of the chasers, mechanism for imparting rotary and longitudinal ,movements to the shaft, and'mechanism operable by a longitudinal movement of the shaft to move said means at a slightly different speed longitudinally therewith to permit a gradual outward movement of the chasers.

5. In combination, a revoluble and axially movable chaser carrying head,- chasers carried for radial movements by said head,

' 'means shiftable axially of said head and having parts which coact with parts of the chasers to permit the chasersto have slow outward radial movements'when said means is retracted from the head, and mechanism operable to impart revoluble movements to said head and means and-differential axial movements 1n the same direction thereto.

'6. In "COmbHlaiTLOII, a rotatable chaser carrying head, chasers carried for radial movements by said head and havinglaterally projecting parts, a member mounted for rotation with said head and being axially movable relative thereto, said member having parts projecting therefrom for coacting with the laterallyprojecting parts of the chaser-s for permitting the chaser-s to have gradual outward. radial movements when said member is moved. in one direction axially of the head, said member being rota-- table with the head, and mechanism operable to impart rotary movements to the head and differential axial movements in the same direction to said head and member.

7.. In'combination, a shaft, a head carried by said shaft, chasers carried for radial movements by the head, a collar, mounted on said shaft for axial shifting movements relative thereto and having parts for coacting with saidchasers to permit the same to have gradual outward radial movements when the collar is mbved away from said head, means imanually operable 'to shift said collar relative to the head'mechanism operable to impart rotary and axial movements to the shaft, and means operable by an axial move ment of the shaft to impart movement to said collar 11 the same direction as the axial 'movementof the shaft but relatively slower.

8. In combination, a shaft, a head carriedv by the shaft, chasersj carried by the head for inward and outward movements relative .to its center, means influencing an outward movement of the'chasers, a collar mounted on the shaft for rotation with the head and for axial n'iovements relative thereto, said collar having parts for coacting with the chaser-s for moving the same inward when the collar is moved toward the head and for permitting chaser-s to have slow outward movements when the collar is moved away from the head, means manually operable to at a slower speed than the axial movement of the shaft in Cr c rried by said shaft and having radially movable chasers influenced to normally move.

outward, a collar mounted on the shaft for 2lXl2tl,Sl-ll'ftl!lg movements relative thereto and having parts for coacting with the ,chasers to more the same inward when the collar moved toward said mechanism and Jttmg gradual. outward movements for peril to the chasers when the collar is moved away from said mechanism, means for imparting rotary and axial movements to said shaft, and rack and pinion means for communicating axial movements to said collar in the direction of axial movements of the shaft but at a different speed to the speed of movement of the shaft.

1G. in combination, a rotatable and axially n'iovable shaft, a. threading mechanism carriad by said shaft and having radially movable Chasers, means rotatable with and shiftable longitudinally of the shaft and adapted to operate on the chasers to move them inward wheii said means is shifted in one direction and to permit controlled out ward movements of the chasers when the is moved in the opposite direction on ,the shaft, means manually operable to shift said chaser controlling means longitudinally of the shaft, means for impartingrotary and longitudinal movements to the shaft, and rack and pinion means connecting said shaft and said manually controlled means for communicating axial shifting movements to said chaser controlling means from longitudin'al movements of the shaft'in the same direction therewith but at a different speed.

11. in combination, a rotatable and axially movable threadcuttiug mechanism havination, a rotatable and axially movable shaft, thread cutting mechanism .ing movable thread-cutting dies, die controllime 111eans rotatable with said mechanism and axially movable relative thereto to vary the distance between the axis of said mechanism and the cutting points of its dies, mechanism operable to impart rotary n'1ovements to both said thread-cuttingmechanism and means and relative axial movements thereto, and means adjust able to limit the axial movements in one direction of the chaser controlling means.

12. In combination, a shaft having a series of circular rack-teeth thereon, a thread-cutting mechanism carried by said shaft and having movable chasers, mechanism for imparting rotary a d axial. movements to said shaft, means rotatable with said mechanism and axially movable relative thereto and operable to control tlu. movements of the .ehasers to vary the distance between their cutting points and their turning axis, a rackhar movable with said means, a eountershaft, different sized pinions carried by said countershaft, one in mesh with the shaft raele teeth and the other in mash with the ackbar teeth and operable to communicate axial movements to said means from axial movements of said first shaft.

13. In combination; a rotatable head, chasers carried for inward and outward moven'ients by the head and influenced to neri'nally move outward, means manually hkltable axially of the head and work be illfI acted on and having a part which turns with the head and is adapted to operate on the chasers to move them inward when such part is shifted in. one'direetion relative to the head and to permit gradual outward movements of the chasers when said part is shifted in the opposite direction relative to the head, amllmechanism operable by a rotating ot' the headto impart movements to said means axially of the head.

14-. in combination, a rotatable head. ehasers carried for radial movements by said head and influenced to normally move ohtward relative thereto, mechanism for i111- partine rotary and axial movements to the head, means shillable axially of the head and ha vine a par: for rotation with the head and adapted when moved in one direction relative to the'head to operate on the chasers to move them inward and when moved in the opposite. direct ion relative to the head to permit gradual outward movmnents to the chasers, nism to move said first means axially with the axial movements of the head in one direction but slower than such movements of the head. 1 v

15. In combim'ition, a rotatable head. chase ers ward relative thereto, mechanism for imparting rotary and axial moven'ients to the to permit and means operable by said 111echa carried for radial movements by said head and influenced to normally move out-' h ad. means shit'table axially oft. the head and havin; a part for rotation with the head and adapted when moved in one direction relative to the head to operate on the chasers to move them inward and when moved in the opposite direction relative to the head gradual outward moven'ients to the chasers. means operable by said mechanism to move said first means axially with the axial movements of the head in one direct ion but. slower than such movements of the head, and means adjustable to limit the chaser depressing moven'ients of said first means;

it In combination, a shaft having a series of circular rael': teeth thereon, a thread cutting, mechanism carried by said shaft and having radially movable ehasers which are normally influenced to move outward, mechanism for imparting rotary and longitudinal movements to said shat't, means shiftable longitudinally of part which is rotatable with the shaft and adapted when n'ioveld in one direction to operate 011 the mechanism chaser-s to inwardly depress the same and when moved in the opposite direetioi'rto permit gradual outward movements of the chasers, a rack-bar movable with said means, a eountershaft,

different sized pinions carried by said countershaft one in mesh with the shaft rack teeth and the other in mesh with the rackbar teeth aml operable to communicate longitudinal movements to said means from longitudinal movements of the first shaft but at a slower speed than the movements of the first shaft to effect a gradual retraction of said chaser operating part from the head.

17. In combination, a shaft, a thread cutting mechanism carried by said shaft and l1a1ing radially movable chasers which are normally influenced to move outward relative to the head. mechanism for imparting rotary and axial movements to the shaft, mechanism operable by the 'longitmlinal nmven'ients of said shaftfor permitting the mechanism chasers to have. slow outward 1no.'e111ents to cut a tapered thread. and means manually operable to move the chaser reacting parts of said mechanism in unison into operative or inoperative positions.

l8. in combination. a head, chasers earried to! radial movements by said head, means for imparting rotary and. axial movements to the head, control means for said head driving means, mechanism for cooper atin; with said head driving means to control the outward movements of the ehasers to cut a tapered thread, and means for preventing an engaging movement of said eontrol means until said mechanism has been moved to operative position relative to the chasers.

1!). ln combinatiomm rotatable and axi ally movable sha t't, a thread cut ting mechanism carried by said shaft and having ra- 1 MMMMWMM 1i anianimat ona M League dially movable chasers which are influenced to normally move outward, a member rotatable relative to said shaft and having a part for coact-ing with a part of the shaft to cause the shaft to have axial movements when it and said member are relatively rotated, separate manually controlled means for imparting dillerential rotation to said shaft and member, mechanism having a part which is manually movable to move the thread cutting mechanism chasers inward and to permit a slow outward movement thereof and auton'iati'cally operable, when the shaft is rotating and the chasers are depressed thereby, to permit a gradual outward movement of the chasers for cutting a tapered thread, and means for preventing a stopping of the driving of said member when said chaser control mechanism is in operative position. i

20; In combination, a rotatable thread cuting mechanism having radially movable chasers, in ans operable to depress the chasers and permit slowoutward movements thereof in unison, manually controlled means operable to impart axial movements to said mechanism, and means automatically oper-- able to prevent a stopping of said mechanism movingn'ieans when said chaser controlling means is in one position of its movement and operable to effect a stopping ol the axial n'ioving of said mechanism when said chaser controlling means in another position of its movement.

21. In combination, a rotatable and axially movable thread cutting mechanism having radially movable chasers, control means for said chasers operable to inwardly depress the ehasers or to permit gradual retracting movements thereof, means operable to impart axial movements to saidmcchanismwhen rotated, means manually operable to throw 1 said last mentioned means into commission, a member automatically operable to .lOCK said manually controlled means in operative p tion when the chaser controlling means ,n one position of its movement, and means on erable by a movement of said chaser con trolling means to another position of movement to r lease said locking mem from looking position.

22. In combination, a rotatable thread cutting mechanism adjustable to suit v-zork of varying diameters, a speed change nism, manually controlled means for or municating rotation to the threadlnq mechanism from said speed change inccianisan, and means for preventing" a shifting'ot' the speed change mechanism when the threading mechanism is being driven.

23. In combination, a work-holder, .a thread-cutting mechanism, and a cuttingbfi mechanism, one 01; saidmechanisms standing in register Withthe work-holder and the other being movable into and out of register therewith, and means operable to drive said movable mechanism when in operative position and also to drive said other mechanism. i

24;. In combination, driving mechanism, a thread-cutting mechanism, and a cuttingolt mechanism, one being stationary and the other movable relative to the driving mechanism, means operable to connect the drivingand stationary mechanisms, and means automatically operable to connect the driving and movable mechanisms when the latter is moved to operative position.

25. In coi'nbiimtion, a worlchclder, a thread-cutting mechanism, and a cutting-0H mechanism, one'being permanently in register with said work-ho der and the other be ing movable into and out of register therewith power transmission mechanism operable to automatically connectwith and drive said movable mechanism when moved into register with the work-holder, and means operable to connect and disconnect said permanent mechanism and power transmission mechanism.

26. In conibinationQa frame, a threadcutting mechanism mounted :tor rotary movements in said frame, worl: holding means in axial reg ster with said mechanism, means for imparting thread cutting n'iovenicnts to said mechanism, and a cutting mechanism carried by Mild frame for movements between said thread cutting mechanisn'i and work holding means in axial relation thereto or vice versa, said cutting mechanism having driving connrwiion with said power transmittiug mcaz when in operative position between the threading mechanism and work holding means 27. in combination, a frame, a thread-cutca-an :ml a pipe cutting cha :3 said frame, one for s relative to other to enable them to he g ilacedinto or out of axial for driving the movable mechanism when in. one position of its movemen and operable to drive the other mechanism when the movable mechanism is in inoperative position.

2%. in a machine of the class described, a thread cutting mechanism ands pipe cutting mechanism mounted for relative transverse movements to place them into or out of axial register, power transmitting means for driving the pipe cutting mechanism when in operative position and for driving the thread cutting mechanism, and means operable to automatically lock the pipe cutting mechanism in inoperative position when the thread cutting mechanism is being driven. V

30. In a machine of the class described, a frame having its top provided with a transverse \vay,a cutting mechanism shiftable on said way, drive meansn'iounted in said frame beneath said way and having operative connection with said mechanism when it is in one position of its movement on said way.

31. In a machine of the class described, a frame, a cutting mechanism transversely movable on said frame and having a gear, and drive means having a drive gear with which the gear of said mechanism meshes when the mechanism is in one position of its movement relative to the frame.

32. In combination, a frame, a cutting mechanism transversely movable on said frame and having a gear, drive means having a drive gear in the ath of movement of said mechanism and at apted to mesh with the mechanism gear when thelatter is in one position of its movement, and means guarding the drive gear when the cutting mechanism is in inoperative position and being antomatically movable to uncover said gear when the mechanism is moved to operative position.

33. In combination, a rotatable threadt-utting mechanism having radially movable chasers, means operable to control the radial movements of the cl asers, means operable to impartv axial feeding moven'lents to said mechanism, and means automatically operable to effect a stopping of the feeding movements of said mechanism when said chaser controlling means is in a predeter mined position of its movement.

34-. In combination, a rotatable thread cutting mechanism having radially movable chasers, means operable to impart axial feeding movements to said mechanism, means operable by. the feeding movements of said mechanism to permit slow outward movements tosaid chasers and adjustable means actuated by said last mentioned means and automatically operable tostop the oporation of said mechanism when a thread of pret-letermincd length has been cut.

35. in combination, a thread-cutting mechanism mounted for rotary and axial movements and having radially movable rhascr:-', sepa. ately controlled means for iniparting rotary and axial movements to said mechanism, mechanism for cooperating with said head driving means to control the outuard movements of the chasers to cut a ta pered thread, and means for preventing a movement thereof to control.

driving of the thread-cutting mechanism until said chaser controlling mechanism has been moved to operative position relative to the chasers.

86. In combination, a thread-cutting mechanism, a drive mechanism, double conrcction between said mechanisms for com municating simultaneous rotary and axial movements to the former, means automatically operable by the axial movement of said thread-cutting mechanism to control the radial. movements of its chasers to cut a tapered thread, and means for preventing a breaking of one of said driving connections between said mechanisms when said chaser controlling means is inv operative position.

37. In combination, a. thread-cutting mechanism, means for imparting axial moven'icnts to said mechanism, means for controlling the radial movements of the mechanism chasers to cuta tapered thread when said mechanism is being axially moved, and mechanism cooperating with said chaser controlling means and automatically oper-' able to disconnect said thread-cuttin mechanism'and the driving means there or at a predetermined point in a thrcadcutting operation.

38. In combination, a thread-cutting mechanism, means forimparting axial moven'ients to said mechanism and having a control part, chaser controlling means associated with said mechanism and automatically movable relative thereto when said mechanism is being axially moved, and mechanism connecting said chaser controlling means with the control part of said first means for preventing a releasing movement of such part until a thread of predetermined length has been cut.

39. In combination, -an axially movable thread-cutting mechanism, means movable relative to said mechanism during an axial the moven'tcnts oi the mechanism chascrs to cut a tapered thread, mechanism for im 'iarting axial movements to said cutting mechanism and having a normally released clutch part, and II'IQHHS autdmatically operable to lock said clutch part in closed position during a thread cutting operation and to release such part to permit a disconnecting of said driving and cutting mechanisms at a predetermined poiht in a thread. cutting operation.

40. In combination, a thread cutting mechanism and a pipe cutting mechanism mounted for relative movements to place them into or out of axial register, drive means for said mechanisms, and means for permitting said driving means to drive only one of said mechanisms when they are in register.

4]. In combination, a thread cutting mechanism and a pipe cutting mechanism, one of said mechanisms being stationarily them into or out of axial register, power transmitting means for driving the threadcutting mechanism and also for drivmg the pipe-cutting mechanism when in its operative posit-ion, and means operable to prevent a connecting of said power transmitting means and the thread-cutting mechanism when the pipe-cutting mechanism is in operative position.

43. In combination, a pipe-threading mechanism, a pipe-cutting mechanism movable into and out of operative position, a power transmission mechanism operable to communicate rotary and axial movements to the thread-cutting mechanism and to drive said p-ipecutting mechanism when in operative position.

44. In combination, a thread-cutting mechanism, a power transmission mechanism operable to communicate rotary and axial movements to the thread-cutting mechanism, and a pipe-cutting mechanism movable transversely of the thread-cutting mechanism and automatically connecting with said power transmitting mechanism when moved to one position of its movement.

45. In combination, a threadcutting mechanism 'carrying shaft, a power transmission mechanismfor communicating rotation to said shaft, a work-holder in axial register with said thread-cutting mechanism, and a work-cutting mechanism movable into or out of axial register with said work-holder and adapted when in operative position to have driving connection with said power transmission mechanism.

46. In combination, a thread-cutting mcchanism,. means for imparting threadcutting movements to said mechanism, a work-holder in register with said mechanism, a pipe-cutting mechanism movable into or out of axial register with said workholder and when in axialregister therewith having driving connection with said means.

47. In combination, a work holder, a thread-cutting mechanism and a pipe-cutting mechanism, one being in permanent register with said work-holder and the other being movable into and out of register therewith, a power transmission mechanism adapted to have driving. connection with said permanently located mechanism and with said other mechanism when in e ister with the work-holder.

48. In combination, a thread cutting mechanism, a. drive shaft, a gear driven by said shaft, double manually controlled connection between said shaft and mechanism for communicating rotary and axial movements to the mechanism, a work-cutting mechanism movable transversely of said shaft into and out of driving connection with said gear, and means for preventingamovement of the work-cutting mechanism to its operative position when said shaft is communicating rotary movements to the thread-cutting mechanism.

49. In combination, a threadcutting mechanism, a drive shaft, means'driven by said shaft, manually cont-rolled connection between said mechanism and shaft for 00* municating rotary movements from one o the other, and a work-cutting mechanism movable relative to said means into and out of driving connection-therewith, and means for preventing a driving connection of said shaft and thread-cutting mechanism when the work-cutting mechanism is in operative position.

50. In combination, a thread cutting mechanism, a drive shaft, means driven by said shaft, separable connection between said shaft and mechanism for communicating rotation from one to the other, aworkcutting mechanism movable relative to said,

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM W. VOSPER. WVitnesses:

C. W. OWEN, S. T. KLOTZ. 

